by model murdering » Sat May 05, 2018 2:14 pm
Ya gotta break the sheen, or re-scuff ANY unknown. Period. It's painting 101.
Start somewhere between 800 and 1500 depending on the quality of the surface and how the material cuts. On a NICE raw resin offering, say 1000/1200. I like to wet sand after a thorough de-greasing in Super Clean. I throw a few drops of Dawn in the water so the de-greasing continues as you work. The bonus is that your paper stays clean and lasts longer. You will feel the difference in the cut.
A cleanser clean up is mandatory in my book. Somewhat old-school, but time tested. The cleanser rouge is used to scrub out the seams and edges: WHICH is where GOOD paint jobs always come loose; because of non-thorough/incomplete prep work. I have a coupla old tooth brushes for the task. One still fluffy with full bristles, and one with the nap cut back a bit for grinding out seams or panel lines.
A toothpick of the round variety works good for scuffing out seams too. Depending on how they look, I may also back track and hone them out using coarse rubbing compound. Crappy seams that arent smooth, are one of the number one causes of boogers and blems in an otherwise nice paint job.
Good Luck!